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參數(shù)資料
| 型號： | LT3494AEDDB |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.45 A SWITCHING REGULATOR, PDSO8 |
| 封裝： | 3 X 2 MM, PLASTIC, MO-229WECD-1, DFN-8 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 261K |
| 代理商： | LT3494AEDDB |
LT3494/LT3494A
1
3494fb
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Micropower Low Noise
Boost Converters with
Output Disconnect
The LT
3494/LT3494A are low noise boost converters
with integrated power switch, Schottky diode and output
disconnect circuitry. The parts use a novel* control tech-
nique resulting in low output voltage ripple as well as high
efciency over a wide load current range. This technique
guarantees that the switching frequency stays above the
audio band for the entire load range. The parts feature a high
performance NPN power switch with a 350mA and 180mA
current limit for the LT3494A and LT3494 respectively. The
quiescent current is a low 65μA, which is further reduced
to less than 1μA in shutdown. The internal disconnect
circuitry allows the output voltage to be isolated from the
input during shutdown. An auxiliary reference input (CTRL
pin) overrides the internal 1.225V feedback reference with
any lower value allowing full control of the output voltage
during operation. The LT3494/LT3494A are available in a
tiny 8-lead 3mm
× 2mm DFN package.
OLED Power Supply from One Li-Ion Cell
■ Low Quiescent Current
65μA in Active Mode
1μA in Shutdown Mode
■ Switching Frequency is Non-Audible Over Entire
Load Range
■ Integrated Power NPN:
350mA Current Limit (LT3494A)
180mA Current Limit (LT3494)
■ Integrated Schottky Diode
■ Integrated Output Disconnect
■ Integrated Output Dimming
■ Wide Input Range: 2.3V to 16V
■ Wide Output Range: Up to 40V
■ Tiny 8-Lead 3mm
× 2mm DFN Package
■ OLED Power
■ Low Noise Power
■ MP3 Players
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
*Patent pending.
SW
CAP
VCC
SHDN
CTRL
VOUT
FB
GND
2.21M
3494 TA01a
LT3494
4.7
μF
2.2
μF
15
μH
0.22
μF
VIN
3V
TO 4.2V
VOUT
16V
16mA
LOAD CURRENT (mA)
0.1
0
V
OUT
PEAK-TO-PEAK
RIPPLE
(mV)
10
15
1
10
100
3494 TA01b
5
LT3494
FIGURE 5 CIRCUIT
100MHz MEASUREMENT BW
LOAD CURRENT (mA)
0.1
60
EFFICIENCY
(%)
POWER
LOSS
(mW)
70
80
90
1
10
100
3494 TA01c
50
40
30
20
160
200
240
280
120
80
40
0
VIN = 3.6V
LOAD FROM
CAPACITOR
LOAD FROM
VOUT
Output Voltage Ripple
vs Load Current
Efciency and Power Loss
vs Load Current
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LT3494AEDDB#PBF | 制造商:Linear Technology 功能描述:BOOST 2.3 - 16V 0.35A 40V 制造商:Linear Technology 功能描述:BOOST, 2.3 - 16V, 0.35A, 40V, 20QFN |
| LT3494AEDDB#TR | 制造商:Linear Technology 功能描述:Micropower Low Noise Boost Converter 8-Pin DFN EP T/R |
| LT3494AEDDB#TRM | 制造商:Linear Technology 功能描述:Micropower Low Noise Boost Converter 8-Pin DFN EP T/R |
| LT3494AEDDB#TRMPBF | 功能描述:IC REG BOOST ADJ 0.35A 8DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:500 系列:- 類型:切換式電容器（充電泵），反相 輸出類型:固定 輸出數(shù):1 輸出電壓:-3V 輸入電壓:2.3 V ~ 5.5 V PWM 型:Burst Mode? 頻率 - 開關:900kHz 電流 - 輸出:100mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 細型，TSOT-23-6 包裝:帶卷 (TR) 供應商設備封裝:TSOT-23-6 其它名稱:LTC1983ES6-3#TRMTR |
| LT3494AEDDB#TRPBF | 功能描述:IC REG BOOST ADJ 0.35A 8DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:500 系列:- 類型:切換式電容器（充電泵），反相 輸出類型:固定 輸出數(shù):1 輸出電壓:-3V 輸入電壓:2.3 V ~ 5.5 V PWM 型:Burst Mode? 頻率 - 開關:900kHz 電流 - 輸出:100mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 細型，TSOT-23-6 包裝:帶卷 (TR) 供應商設備封裝:TSOT-23-6 其它名稱:LTC1983ES6-3#TRMTR |
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